An H2O Maser survey towards BGPS sources in the Outer Galaxy | |
Xi, Hong-Wei1,2![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() | |
刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
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2016-06-01 | |
卷号 | 16期号:6 |
关键词 | masers radio lines: ISM stars: formation |
ISSN号 | 1674-4527 |
英文摘要 | We performed an H2O maser survey towards 274 Bolocam Galactic Plane Survey (BGPS) sources with 85 degrees < l < 193 degrees using the Nanshan 25 m radio telescope. We detected 25 H2O masers, and five of them are new detections. The detection rate of H2O masers in our sample is 9% which is very low. The detection rate of H2O masers increases as the 1.1 mm flux density of BGPS sources increases, and both the peak flux density and luminosity of H2O masers increase as the sources evolve. The detection rate of H2O masers toward BGPS sources without HCO+ emission is low. The BGPS sources associated with both H2O and CH3OH masers seem to be more compact than those only associated with H2O masers. This indicates that the sources with both masers may be in a relatively later evolutionary stage. The strongest H2O maser source G133.715+01.217, also well known as W3 IRS 5 which has a flux density of 2.9x10(3) Jy, was detected at eight different nearby positions. By measuring the correlation between the flux densities of these H2O masers and their angular distance from the true source location, we get the influence radius r = 1/0.8 log(F-0/3rms). For our observations, strong sources can be detected anywhere within this radius. It is helpful to determine whether or not a weak maser nearby the strong maser is a true detection. |
WOS标题词 | Science & Technology ; Physical Sciences |
类目[WOS] | Astronomy & Astrophysics |
研究领域[WOS] | Astronomy & Astrophysics |
关键词[WOS] | STAR-FORMING REGIONS ; GALACTIC PLANE SURVEY ; DUST CONTINUUM SOURCES ; YOUNG STELLAR OBJECTS ; GLIMPSE POINT SOURCES ; GHZ METHANOL MASERS ; WATER MASER ; IRAS SOURCES ; AU SCALES ; CATALOG |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000377524600004 |
内容类型 | 期刊论文 |
源URL | [http://ir.xao.ac.cn/handle/45760611-7/1400] ![]() |
专题 | 恒星形成与演化研究团组 新疆天文台_射电天文研究室 |
作者单位 | 1.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Key Lab Radio Astron, Urumqi 830011, Peoples R China |
推荐引用方式 GB/T 7714 | Xi, Hong-Wei,Zhou, Jian-Jun,Esimbek, Jarken,et al. An H2O Maser survey towards BGPS sources in the Outer Galaxy[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2016,16(6). |
APA | Xi, Hong-Wei.,Zhou, Jian-Jun.,Esimbek, Jarken.,Wu, Gang.,He, Yu-Xin.,...&Yuan, Ye.(2016).An H2O Maser survey towards BGPS sources in the Outer Galaxy.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,16(6). |
MLA | Xi, Hong-Wei,et al."An H2O Maser survey towards BGPS sources in the Outer Galaxy".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 16.6(2016). |
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